From: Stefano Babic <sbabic@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] ARM: MX51: PLL errata workaround
Date: Thu, 14 Jul 2011 10:30:11 +0200 [thread overview]
Message-ID: <4E1EA913.107@denx.de> (raw)
In-Reply-To: <1310627513-17461-1-git-send-email-david@protonic.nl>
On 07/14/2011 09:11 AM, David Jander wrote:
> This is a port of the official PLL errata workaround from Freescale to
> mainline u-boot.
> The PLL's in the i.MX51 processor can go out of lock due to a metastable
> condition in an analog flip-flop when used at high frequencies.
> This workaround implements an undocumented feature in the PLL (dither
> mode), which causes the effect of this failure to be much lower (in terms
> of frequency deviation), avoiding system failure, or at least decreasing
> the likelihood of system failure.
>
> Signed-off-by: David Jander <david@protonic.nl>
Hi David,
do you have now also an official Errata number from Freescale to be
added to your documentation ?
Best regards,
Stefano Babic
--
=====================================================================
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de
=====================================================================
next prev parent reply other threads:[~2011-07-14 8:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-14 7:11 [U-Boot] [PATCH] ARM: MX51: PLL errata workaround David Jander
2011-07-14 8:30 ` Stefano Babic [this message]
2011-07-14 10:13 ` David Jander
2011-07-14 10:37 ` Stefano Babic
2011-07-14 10:23 ` David Jander
2011-07-14 10:41 ` Stefano Babic
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4E1EA913.107@denx.de \
--to=sbabic@denx.de \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox